When the pollen and egg in a flower combine to form seeds in a flower.

By spores, as tubers, as bulbs and by cutting (striking)

Cells in some plants (that don't have seeds). The cells help these plants to reproduce.

Because they contain chlorophyll.

To protect the seeds

To hold the plant in the soil and to take in water and minerals from the soil

Sepal, Stamen, Pistil, and Petal

To produce seeds, and then a fruit.

To start growing

They have chlorophyll which helps the plant make food. They take in the carbon dioxide and sunlight which also help make their food.

Daffodils, onions, garlic...

They hold the leaves and other parts above the ground, and they carry the water and minerals from the roots to the other parts of the plant.

Water, fertile soil and sunlight